P Allen Copeland; Four Ways West Publications; 2002; Colour
This book features the D&RGW standard gauge steam and diesel transition from the late 1930s to 1957. Lots of rare photos. Hardcover, 128 pages.
A solid publication with many photographs of 1950's D&RGW paint scheme's.
Denver Photo Highlights:
p11: 1959 Colour photo of a set of for F units spliced by a GP-9 at Soldier Summit.
p35: 1950 Colour photo of platforms 1 (Denver Zephyr or California Zephyr), 2 & 3 (Royal Gorge Steam Class M-64 #1706) looking north.